Variance Calculator
www.calculatorsoup.com › variance-calculatorHow to Calculate Variance Find the mean of the data set. Add all data values and divide by the sample size n . x ¯ = ∑ i = 1 n x i n Find the squared difference from the mean for each data value. Subtract the mean from each data value and square the result. ( x i − x ¯) 2 Find the sum of all the squared differences.